Fig. 7.

(A) 32 × 32 pixel receptive fields produced by the NBCM model (only 256 of 1024 are shown), showing the spatial localization of the fields. (B) Fourier-space plot showing the half-maximum contour for each of the NBCM receptive fields shown in A. The spectra of the 32 × 32 fields are qualitatively similar to those of 16 × 16 fields (see Fig. 3B and C).